CD
Definition:
CD stands for Compact Disc and is a popular medium for music. Music on a CD is stored digitally. Playing a CD requires a CD player or other device, such as a computer, with a CD drive.
Certain types of writeable CDs can be used by computers to store data.
Here's a word you may not know...
social network
A social network represents a web site where people gather virtually. Generally, each person that belongs to a social network has his or her own profile page and then becomes "friends" with other members of the social networking site. Friends on the site write blog posts, add their favorite pictures, music and video, as well as write comments on other people's profile pages.
Some of the more popular social networking sites include MySpace, Facebook and Flickr.
